For forty-eight hours the uncontrolled atomic motor dragged the masterless vessel with its four unconscious passengers through the illimitable reaches of empty space, with an awful and constantly increasing velocity. When only a few traces of copper remained in the power-plant, the acceleration began to decrease and the powerful springs began to restore the floor and the seats to their normal positions. The last particle of copper having been transformed into energy, the speed of the vessel became constant. Apparently motionless to those inside it, it was in reality traversing space with a velocity thousands of times greater than that of light. As the force which had been holding them down was relaxed, the lungs, which had been able to secure only air enough to maintain faint sparks of life, began to function more normally and soon all four recovered consciousness, drinking in the life-giving oxygen in a rapid succession of breaths so deep that it seemed as though their lungs must burst with each inhalation. DuQuesne was the first to gain control of himself. His first effort to rise to his feet lifted him from the floor, and he floated lightly to the ceiling, striking it with a gentle bump and remaining suspended in the air. The others, who had not yet attempted to move, stared at him in wide-eyed amazement. Reaching out and clutching one of the supporting columns, he drew himself back to the floor and cautiously removed his leather suit, transferring two heavy automatic pistols as he did so. By gingerly feeling of his injured body, he discovered that no bones were broken, although he was terribly bruised. He then glanced around to learn how his companions were faring. He saw that they were all sitting up, the girls resting, Perkins removing his aviator's costume. "Good morning, Doctor DuQuesne. What happened when I kicked your friend?" DuQuesne smiled. "Good morning, Miss Vaneman. Several things happened. He fell into the controls, turning on all the juice. We left shortly afterward. I tried to shut the power off, and in doing so I balled things up worse than ever. Then I went to sleep, and just woke up." "Have you any idea where we are?" "No, but I can make a fair estimate, I think," and glancing at the empty chamber in which the bar had been, he took out his notebook and pen and figured for a few minutes. As he finished, he drew himself along by a handrail to one of the windows, then to another. He returned with a puzzled expression on his face and made a long calculation.